JPH0218648B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a tube wrapping device for a Hampson heat exchanger, and is particularly suitable for manufacturing a large Hampson heat exchanger made of a soft material. This invention relates to a tube winding device for a Hampson heat exchanger.

[Background of the invention]

Conventional Hampson heat exchangers made of soft materials have all been small, but as large-capacity heat exchangers are required, the weight of tube bundles made of rolled tubes also tends to increase. .
Therefore, when the tube bundle is wound spirally, a strong force is applied to each tube due to the inertial force that acts when the rotation starts and stops, and the solder at each tube joint comes off, causing damage to other tubes. This has caused problems in the manufacture of the tube bundle, such as causing damage. The structure of the Hampson heat exchanger will be explained with reference to FIGS. 3 and 4. In the figure, the heat exchanger is constructed by inserting a tube bundle 1 in which tubes 2 are spirally wound around a core metal 3 into a shell 5, and attaching tube sheets 6 to both ends. Further, the tube bundle 1 maintains a small interval between the tubes 2 while
The process of manufacturing each tube bundle 1 by helically wrapping and soldering via spacers 4 is the most important point in manufacturing the Hampson heat exchanger. During this work, when winding the tube 2 around the core bar 3 in a spiral manner, the tube 2 is wound while rotating the core bar 3, but the weight increases as the winding diameter of the tube bundle 1 increases. And tube 2
Excessive force is applied to the joint of tube 2 due to the inertial force generated by the acceleration and deceleration (acceleration in the decreasing direction) when the rotation starts and stops at the beginning and end of winding, causing damage to the tube. There was a drawback.

In addition, as a tube winding device for a Hampson type heat exchanger, Japanese Patent Publications No. 7359/1983 and Japanese Patent Publication No. 58/1982
Publication No. 7374 is known.

[Purpose of the invention]

An object of the present invention is to provide a tube wrapping device for a Pumpson heat exchanger that can prevent damage to the tubes when wrapping the tubes around a tube bundle of a large Hampson heat exchanger.

[Summary of the invention]

The present invention provides a tube winding device for a Hampson type heat exchanger that rotatably supports a core metal and wraps a tube while rotating the core metal. It is characterized by being provided with a driving electric motor whose acceleration can be adjusted.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tube winding device according to the present invention will be described below with reference to FIGS. 1 and 2. In the figure, the same reference numerals as in the above description indicate the same members. Reference numeral 7 denotes a drive device, which is composed of a main electric motor 8, a variable speed pulley, a speed reducer, a torque limiter coupling 11, and a bearing 13. In addition,
The main electric motor 8 has a stepless speed change function by controlling the primary voltage, and adjusts the acceleration and deceleration (acceleration in the decreasing direction) by adjusting the starting time with a dial in advance. The configuration is such that it can be suppressed to a predetermined value or less at the time of starting and at the time of stopping. Further, the torque limiter coupling 11 is configured not to transmit driving force when an overload condition occurs while the core metal 3 is rotating. Next, 15 is a driven device,
A shaft 14 is supported between the drive device 7 and the shaft 14 . Note that 16 is an operation panel, 17 is a hand switch, and 18 is an emergency stop switch.

In such a configuration, the work of winding the tube 2 is performed after fixing the core bar 3 to the shaft 14 attached to the shaft attaching/detachable plate 12 of the driving device 7 and the driven device 15, and then driving the main motor 8 to connect the reducer 10. The core metal 3 rotates via the torque limiter coupling 11. At this time, the tube 2 is pulled out from the tube drum 19 and its tip is soldered to the end of the core metal 3. When the tube 3 starts to rotate, the tube 2 is pressed against the core metal 3 and wound spirally in the axial direction, and when it reaches the end of the core metal 3 in the opposite direction, the main motor 8 is stopped. One step of the wrapping work is completed. The tube bundle 1 can be manufactured by repeating this operation. In the above work, when starting and stopping the rotation of the core metal 3, it is driven by the main electric motor 8 to keep its acceleration and deceleration low, so that the starting and stopping are smooth, and the tube due to inertial force is 2 damage can be prevented.
In addition, if an overload condition occurs for some reason while the core metal 3 is rotating, the torque limiter coupling 11 will act to automatically stop the rotation, and if an abnormal situation occurs, the torque limiter coupling 11 will automatically stop the rotation. Since the inertial force during stopping can be absorbed by the torque limiter coupling 11 slipping, damage to the tube 2 due to the inertial force can be prevented. In addition, according to such a configuration, when manufacturing the tube bundle 1, the tube bundle 1
Since the acceleration and deceleration acting on the tube 2 can be kept low, damage to the tube 2 during manufacture can be prevented and the quality of the product can be improved. Also,
In the manufacturing work described above, since the main electric motor 8, which is the driving electric motor of the drive system, controls the acceleration and deceleration of the tube bundle 1, there is no need to perform special operations when starting and stopping, which also improves work efficiency. I can figure it out.

In addition, in the above-described embodiment, a configuration was described in which the acceleration is mechanically controlled in the drive system, but the present invention is not limited to this.
The same effect can be obtained with a configuration in which acceleration is detected and electrically controlled.

〔Effect of the invention〕

As explained above, according to the present invention, damage to the tube can be prevented when the tube is wound around the tube bundle.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a tube wrapping device according to the present invention, FIG. 2 is a control circuit diagram of the tube wrapping device of FIG. 1, and FIG. 3 is a structure of a Hampson heat exchanger. Cross-sectional view, Figure 4 is A- in Figure 3.
It is a sectional view of part A. 1...Tube bundle, 2...Tube, 3
... Core metal, 7 ... Drive device, 8 ... Main electric motor, 1
0...Reduction gear, 11...Torque limiter coupling, 13...Bearing, 14...Shaft, 15
...Followed device.

Claims (1)

[Claims] 1. In a tube wrapping device for a Hampson heat exchanger that rotatably supports a core metal and wraps a tube while rotating the core metal, the acceleration of the core metal is adjusted in the drive system of the core metal. A tube winding device for a Hampson type heat exchanger, characterized in that it is equipped with a drive electric motor.